Description:Mexico's Supreme Court ruled last week that a law banning gay marriages in the southern state of Oaxaca state was unconstitutional, paving the way for gay couples to marry in that state and in the rest of the country. The tribunal dismissed the law that declared the purpose of marriage was to "prolong the species." The court also said in its ruling that conditioning marriage unions to those between a man and a woman "violated the principle of equality." Activists see the law as part of a sea(0:54)